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A scalable block layer for high-performance SSD storage, known as blk-multiqueue or blk-mq and developed primarily by Fusion-io engineers, was merged into the Linux kernel mainline in kernel version 3.13, released on 19 January 2014. This leverages the performance offered by SSDs and NVMe by allowing much higher I/O submission rates.
HMB allows SSDs to utilize the host's DRAM, which can improve the I/O performance for DRAM-less SSDs. [47] For example, HMB can be used for cache the FTL table by the SSD controller, which can improve I/O performance. [48] NVMe 2.0 added optional Zoned Namespaces (ZNS) feature and Key-Value (KV) feature, and support for rotating media such as ...
Flash-based storage does not suffer the limitation of a battery, but RAM-backed storage is faster and does not experience write amplification. [ 3 ] [ 8 ] [ 9 ] As a result of having no moving mechanical parts, solid-state storage has no data access latency required to move the media as in an electromechanical storage device.
This can significantly reduce the performance of the system. [16] Many SSD controllers implement background garbage collection (BGC), sometimes called idle garbage collection or idle-time garbage collection (ITGC), where the controller uses idle time to consolidate blocks of flash memory before the host needs to write new data. This enables the ...
File Systems for Open-Channel SSDs With open-channel SSDs, the L2P mapping can be directly integrated or merged with storage management in file systems. [10] This avoids the redundancy between system software and SSD firmware, and thus improves performance and endurance. Further, open-channel SSDs enables more flexible control over flash memory.
A less obvious effect is that as density improves, the number of DIMMs needed to supply any particular amount of memory decreases, which in turn means less DIMMs overall in any particular computer. This often leads to improved performance as well, as there is less bus traffic.
If the storage system identifies a block which it has already stored, only a reference to the existing block is stored, rather than the whole new block. The advantage of in-line deduplication over post-process deduplication is that it requires less storage and network traffic, since duplicate data is never stored or transferred.
Storage efficiency is the ability to store and manage data that consumes the least amount of space with little to no impact on performance; resulting in a lower total operational cost. Efficiency addresses the real-world demands of managing costs, reducing complexity and limiting risk.
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